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It seems that FormGrid is not capable of handling MultipleDataForm objects.

Versions

• OS: debian (sid)
• Gajim version: 1.2.91+3f38952e (master)
• GTK version: 3.24.20
• Python-nbxmpp version: 1.0.0

Steps to reproduce the problem

1. call an adhoc command which replies with a "MultipleDataForm"

Example MultipleDataForm

<iq type="result" to="me@foo.bar/gajim" from="x.foo.bar">
    <command xmlns="http://jabber.org/protocol/commands" node="list_foobar" status="completed">
        <x xmlns="jabber:x:data" type="result">
            <title>foobar!</title>
            <reported>
                <field var="memo" />
                <field var="value" />
                <field var="type" />
            </reported>
            <item>
                <field var="memo">
                    <value>tes</value>
                </field>
                <field var="value">
                    <value>1</value>
                </field>
                <field var="type">
                    <value>bar</value>
                </field>
            </item>
            <item>
                <field var="memo">
                    <value>tes</value>
                </field>
                <field var="value">
                    <value>1</value>
                </field>
                <field var="type">
                    <value>bar</value>
                </field>
            </item>
        </x>
    </command>
</iq>

Expected behavior

render form correctly

Actual behavior

Traceback (most recent call last):
  File "/home/test/.local/lib/python3.8/site-packages/nbxmpp/dispatcher.py", line 421, in dispatch
    func(self._client, stanza, **user_data)
  File "/home/test/.local/lib/python3.8/site-packages/nbxmpp/util.py", line 123, in func_wrapper
    cb()(result)
  File "/home/test/gajim/gajim/gtk/util.py", line 532, in func_wrapper
    return func(self, *args, **kwargs)
  File "/home/test/gajim/gajim/gtk/adhoc.py", line 220, in _received_stage
    stage_page.process_stage(stage)
  File "/home/test/gajim/gajim/gtk/adhoc.py", line 420, in process_stage
    self._show_form(stage_data.data)
  File "/home/test/gajim/gajim/gtk/adhoc.py", line 446, in _show_form
    self._dataform_widget = DataFormWidget(
  File "/home/test/gajim/gajim/gtk/dataform.py", line 61, in __init__
    self._form_grid = FormGrid(form_node, options)
  File "/home/test/gajim/gajim/gtk/dataform.py", line 129, in __init__
    self._analyse_fields(form_node, options)
  File "/home/test/gajim/gajim/gtk/dataform.py", line 151, in _analyse_fields
    for field in form_node.iter_fields():
  File "/home/test/.local/lib/python3.8/site-packages/nbxmpp/simplexml.py", line 563, in __getattr__
    raise AttributeError
AttributeError